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Date: Wed, 30 Aug 2017 05:47:00 +0000 (UTC)
From: "Ajay Kumar (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.13097391.1503601167000.155436.1504072020827@Atlassian.JIRA>
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Subject: [jira] [Updated] (HDFS-12350) Support meta tags in configs
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archived-at: Wed, 30 Aug 2017 05:47:05 -0000


     [ https://issues.apache.org/jira/browse/HDFS-12350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ajay Kumar updated HDFS-12350:
------------------------------
    Attachment: HDFS-12350.01.patch

> Support meta tags in configs
> ----------------------------
>
>                 Key: HDFS-12350
>                 URL: https://issues.apache.org/jira/browse/HDFS-12350
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Ajay Kumar
>            Assignee: Ajay Kumar
>         Attachments: HDFS-12350.01.patch
>
>
> We should add meta tag extension to the hadoop/hdfs config so that we can retrieve properties by various tags like PERFORMANCE, NAMENODE etc. Right now we don't have an option available to group or list properties related to performance or security or datanodes. Grouping properties through some restricted set of Meta tags and then exposing them in Configuration class will be useful for end users.
> For example, here is an config with meta tag.
> {code}
> <configuration>
>    <property>
>       <name>dfs.namenode.servicerpc-bind-host</name>
>       <value>localhost</value>
>       <tag> REQUIRED </tag>
>    </property>
>    
>   <property>
>       <name>dfs.namenode.fs-limits.min-block-size</name>
>       <value> 1048576 </value>
>       <tag> PERFORMANCE,REQUIRED</tag>
>    </property>
>  <property>
>       <name>dfs.namenode.logging.level</name>
>       <value>Info</value>
>       <tag>HDFS, DEBUG </tag>
>    </property>
>       
> <configuration>
> {code}


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